Synapse nerve junctions, SEM
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Synapse nerve junctions, SEM
Synapse nerve junctions. Coloured scanning electron micrograph (SEM) of a section through nerve cells showing their synapses, the junctions between two nerve cells. At a synapse an electrical signal is transmitted from one cell to the next in only one direction. When an electrical signal reaches a synapse it triggers the release of neurotransmitter chemicals from vesicles (yellow, centre) in the presynaptic cell. The neurotransmitters cross a microscopic gap called the synaptic cleft and bind to receptors on the postsynaptic cell, causing it to propagate an electrical impulse. Mitochondria, which supply the cells with energy, are dark blue/yellow
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6302773
© DR DAVID FURNESS, KEELE UNIVERSITY/SCIENCE PHOTO LIBRARY
Axon Central Nervous System Cross Section Dendrite Dendrites Energy Junction Junctions Message Mitochondria Mitochondrion Nerve Cell Neural Neuron Neurone Neurones Neurons Neurotransmitter Organelle Postsynaptic Presynaptic Relay Relaying Signal Signals Synapse Synaptic System Transmitting Vesicle Vesicles Cells False Coloured Neurological Neurology Section Sectioned
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